MT7TILLA. 209 



57. Mutilla investigatrix. 



Female. Length 4 lines. — Black ; the head large, subquadrate, much 

 larger than the thorax, the posterior lateral angles produced into a 

 sharp spine ; the antennas and mandibles ferruginous. The thorax 

 ferruginous ; the lateral margins and the metathorax fuscous or 

 black, widest in front, then somewhat abruptly narrowed, with the 

 sides of the metathorax rounded and denticulate, having also two 

 or three teeth on the margins anteriorly ; the legs ferruginous, 

 with the tibiae and tarsi more or less fuscous. The basal segment 

 of the abdomen with white pubescence, which forms a triangular 

 patch, the apex of which extends a little into the base of the second 

 segment, which has a fascia of similar pubescence a little before its 

 apical margin ; in the middle the fascia is produced into a trian- 

 gular shape, which extends to the apical margin ; a line of white 

 pubescence continues to the apex. In some examples there is a 

 little white pubescence on the vertex and also on the metathorax. 



Var. The thorax entirely ferruginous and the legs black. 



Hah. Ega. 



58. Mutilla detracta. 



Female. Length 3 lines. — Black, with the antennas, thorax, legs, 

 and basal segment of the abdomen ferruginous ; four or five of the 

 apical joints of the antennas fuscous ; the mandibles and palpi fer- 

 ruginous ; the entire insect very closely punctured. Thorax oblong- 

 ovate, the apical joint of the tarsi black. The second segment of 

 the abdomen with two indistinct ferruginous maculae at the base, 

 its lateral and apical margins with a fascia of bright golden- coloured 

 pubescence ; the rest of the segments with similar pubescence, 

 their lateral margins black. 



Hah. St. Paulo. 



59. Mutilla vivax. 



Female. Length §\-<±\ lines. — Black, the thorax and legs ferrugi- 

 nous, the former oblong-ovate and with four oblong black maculae, 

 two at the sides anteriorly, and two in a line with them posteriorly. 

 The tubercles at the base of the antennae, the base of the antennae, 

 and middle of the mandibles ferruginous; the head and thorax 

 very closely punctured. The tibiae and tarsi, in small examples, 

 more or less fuscous. Abdomen velvet-black; the basal segment, 

 two large somewhat triangular maculae at the base, and the apical 

 margin of the second segment with a broad fascia of pale golden- 

 yellow pubescence ; the other segments covered with the same. A 

 minute tubercle on each side of the thorax a little beyond the 

 middle. 



Hah. Ega. 



